B-1.
Half-lives and decay branching fractions for fission products
 
 
     Nuclide       		  
  Half-life
1 y = 1 year = 365.24219878 days 		 
  Decay mode and
  branching fraction
 		  
  Source  		 
  Notes 
 
  35-Br-85
  2.9 ± 0.06 m
  β-
   1.0
  ENSDF
  [1]
  36-Kr-85
  10.752 ± 0.023 y
  β-
   1.0
  BIPM-5
  36-Kr-85m
  4.48 ± 0.008 h
  IT
  β-
   0.214 ± 0.005
   0.786 ± 0.005
  ENSDF
  38-Sr-90
  28.8 ± 0.07 y
  β-
   1.0
  LNHB
  40-Zr-95
  64.032 ± 0.006 d
  β-
   1.0
  LNHB
  41-Nb-94
  ( 7.3 ± 0.9 ) x 106 d
  β-
   1.0
  IAEA-CRP-XG
  41-Nb-95m
  3.61 ± 0.03 d
  β-
  IT
   0.025 ± 0.001
   0.975 ± 0.001
  LNHB
  [2]
  41-Nb-95
  34.985 ± 0.012 d
  β-
   1.0
  IAEA-CRP-XG
  43-Tc-99
  (2.111 ± 0.012) x 105 y
  β-
   1.0
  ENSDF
  44-Ru-103
  39.247 ± 0.013 d
  β-
   1.0
  IAEA-CRP-XG
  44-Ru-106
  1.018 ± 0.005 y
  β-
   1.0
  IAEA-CRP-XG
  45-Rh-106
  30.1 ± 0.3 s
  β-
   1.0
  IAEA-CRP-XG
  50-Sn-121m
  55 ± 5 y
  β-
  IT
   0.224 ± 0.02
   0.776 ± 0.02
  ENSDF
  51-Sb-122
  2.7238 ± 0.0002 d
  EC
  β-
   0.0241 ± 0.0012
   0.9759 ± 0.0012
  ENSDF
  51-Sb-124
  60.2 ± 0.03 d
  β-
   1.0
  ENSDF
  51-Sb-125
  2.7584 ± 0.0006 y
  β-
   1.0
  IAEA-CRP-XG
  53-I-129
  ( 5.89 ± 0.23 ) x 109 d
  β-
   1.0
  IAEA-CRP-XG
  53-I-131
  8.0233 ± 0.0019 d
  β-
   1.0
  BIPM-5
  53-I-133
  20.87 ± 0.08 h
  β-
   1.0
  LNHB
  [3]
  53-I-135
  6.57 ± 0.02 h
  β-
   1.0
  ENSDF
  54-Xe-131m
  11.930 ± 0.016 d
  IT
   1.0
  BIPM-5
  54-Xe-133
  5.243 ± 0.001 d
  β-
   1.0
  ENSDF
  54-Xe-133m
  2.19 ± 0.01 d
  IT
   1.0
  ENSDF
  54-Xe-135
  9.14 ± 0.02 h
  β-
   1.0
  ENSDF
  54-Xe-135m
  15.29 ± 0.05 m
  β-
  IT
   0.003 ± 0.003
   0.997 ± 0.003
  ENSDF
  [4]
  55-Cs-134
  2.063 ± 0.003 y
  EC
  β-
   0.000003 ± 0.000001
   0.999997 ± 0.000001
  IAEA-CRP-XG
  [5]
  55-Cs-137
  30.05 ± 0.08 y
  β-
   1.0
  IAEA-CRP-XG
  56-Ba-140
  12.753 ± 0.004 d
  β-
   1.0
  BIPM-5
  57-La-140
  1.67850 ± 0.00017 d
  β-
   1.0
  BIPM-5
  58-Ce-141
  32.508 ± 0.010 d
  β-
   1.0
  LNHB
  58-Ce-144
  285.1 ± 0.6 d
  β-
   1.0
  IAEA-CRP-XG
  59-Pr-144
  17.28 ± 0.05 m
  β-
   1.0
  ENSDF
  60-Nd-147
  10.98 ± 0.01 d
  β-
   1.0
  ENSDF
  61-Pm-147
  2.6234 ± 0.0002 y
  β-
   1.0
  ENSDF
  61-Pm-148m
  41.29 ± 0.11 d
  IT
  β-
   0.042 ± 0.007
   0.958 ± 0.007
  ENSDF
  61-Pm-148
  5.368 ± 0.002 d
  β-
   1.0
  ENSDF
  61-Pm-149
  2.2117 ± 0.0021 d
  β-
   1.0
  ENSDF
  61-Pm-151
  1.1833 ± 0.0017 d
  β-
   1.0
  ENSDF
  62-Sm-151
  90 ± 6 y
  β-
   1.0
  ENSDF
  62-Sm-153
  1.938 ± 0.010 d
  β-
   1.0
  IAEA-CRP-XG
  63-Eu-152
  ( 4.941 ± 0.007 ) x 103 d
  β-
  EC
   0.279 ± 0.003
   0.721 ± 0.003
  IAEA-CRP-XG
  [6]
  63-Eu-154
  ( 3.1381 ± 0.0014 ) x 103 d
  EC
  β-
   0.00018 ± 0.00013
   0.99982 ± 0.00013
  IAEA-CRP-XG
  [6]
  63-Eu-155
  4.753 ± 0.016 y
  β-
   1.0
  IAEA-CRP-XG
 
References
 


  BIPM-5

M.-M. Bé, V. Chisté, C. Dulieu, E. Browne, V. Chechev, N. Kuzmenko, R. Helmer, A. Nichols,
E. Schönfeld, R. Dersch, Monographie BIPM-5, Table of Radionuclides, Vol. 2 - A = 151 to 242, 2004.

  LNHB
Laboratoire National Henri Becquerel, Recommended Data,
http://www.nucleide.org/DDEP_WG/DDEPdata.htm, 16 January 2006.

  IAEA-CRP-XG
M.-M. Bé, V.P. Chechev, R. Dersch, O.A.M. Helene, R.G. Helmer, M. Herman, S. Hlavác,
A. Marcinkowski, G.L. Molnár, A.L. Nichols, E. Schönfeld, V.R. Vanin, M.J. Woods, IAEA CRP "Update of X-ray and Gamma-ray Decay Data Standards for Detector Calibration and Other Applications", IAEA Scientific and Technical Information report STI/PUB/1287, May 2007, International Atomic Energy Agency, Vienna, Austria, ISBN 92-0-113606-4.

  ENSDF
Evaluated Nuclear Structure Data File, http://www-nds.iaea.org/ensdf/, 26 January 2006.
 
Notes
 

  [1] β- decay branches of 0.9982 &plusminus; 0.0002 to Kr-85m and 0.0018 &plusminus; 0.0002 to Kr-85.

  [2] ENSDF branching fractions: 0.944 ± 0.007 for IT and 0.056 ± 0.007 for β-.

  [3] β- decay branch of 0.0288 &plusminus; 0.0002 to Xe-133m.

  [4] Branching fractions were averaged from ENSDF database.

  [5] Branching fractions were adopted from ENSDF database.

  [6] Branching fractions were adopted from LNHB data.


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